83 entries under persistent topic. ×

1
hell-bent(adjective, obstinate, insistent, dogged)
1
insubordinate(adjective, obstinate, insistent, dogged)
1
insurgent(adjective, obstinate, insistent, dogged)
1
inveterate(adjective, obstinate, insistent, dogged)
1
invincible(adjective, obstinate, insistent, dogged)
1
mulish(adjective, mean, strong, hard, tough)
1
mutinous(adjective, obstinate, insistent, dogged)
1
narrow-minded(adjective, obstinate, insistent, dogged)
1
obsessive(adjective, obstinate, insistent, dogged)
1
perverse(adjective, mean, hard, tough, firm)
1
pigheaded(adjective, mean, hard, tough, firm)
1
staunch(adjective, set, strong, hard, tough)
1
stouthearted(adjective, obstinate, insistent, dogged)
1
sure(adjective, strong, tough, firm, solid)
1
tight(adjective, strong, tough, firm, solid)
1
unconquerable(adjective, obstinate, insistent, dogged)
1
ungovernable(adjective, obstinate, insistent, dogged)
1
unmanageable(adjective, obstinate, insistent, dogged)
1
unregenerate(adjective, obstinate, insistent, dogged)
1
unruly(adjective, obstinate, insistent, dogged)
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APASmart Define. (2015). iron thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/iron/thesaurus/synonyms
ChicagoSmart Define. 2015. "iron thesaurus" https://smartdefine.org/iron/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, iron thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/iron/thesaurus/synonyms>.
MLASmart Define. "iron thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/iron/thesaurus/synonyms>